What causes a roof to sag?

Your roof is an integral part of your building, so noticing that it’s begun to sag can be worrying.

A roof with a very slight sag is unlikely to completely collapse any time soon, having said that, a sagging roof isn’t a problem that should be ignored and left to get worse.

The sooner that you can get to the bottom of the cause of a sagging roof and fix it the better. Roofs are designed to be straight, and if yours is sagging it could be a sign of a structural problem.

Here are the three commonest reasons roofs sag.

Excessive weight

All roofs have their limits when it comes to how much weight they can safely support. If this weight is exceeded, it can cause the roof to sag under the pressure. Traditionally, houses built during the Victorian times had slate tile roofs. In some instances, these tiles were later replaced with heavier alternatives like concrete tiles, which results in sagging roofs struggling under the extra weight. Solar panels on the roof can also cause overloading.

Inadequate or damaged joints or rafters

Your roof joints and rafters are like the skeleton frame that holds up your roof. Over time, any damage to your roof’s timber frame will begin to cause structural problems and may prevent it from providing your roof with adequate support, one sign of which is a sagging roof.

Water damage

If your roof is not maintained and protected from the elements, then rain and damp can begin to seep in and cause damage over time. Maintaining your roof tiles, shingle, flashing, and gutters can help to avoid excess water damaging your roof and causing it to sag.

If you notice a sag in your roof, it’s best to call in an expert straight away as the problem is likely to become more serious and expensive to fix with time.

Categories: All Slates, Re-covering Your Roof, Re-roofing, Reclaimed Roofing, Reclaimed Slate, Roof Maintenance, Roof Styles, Roof Types, Roofing Materials, Slate, Slate Roof Design, Slate Roof Installation, Slate Roof Style, Slate Tiles, Slates Roofs